20427436 has 12 divisors (see below), whose sum is σ = 36334480. Its totient is φ = 10046160.

The previous prime is 20427409. The next prime is 20427437. The reversal of 20427436 is 63472402.

It is not an unprimeable number, because it can be changed into a prime (20427437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41616 + ... + 42103.

Almost surely, 2^20427436 is an apocalyptic number.

It is an amenable number.

20427436 is a deficient number, since it is larger than the sum of its proper divisors (15907044).

20427436 is a wasteful number, since it uses less digits than its factorization.

20427436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83784 (or 83782 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 20427436 is about 4519.6721120010. The cubic root of 20427436 is about 273.3618801568.

Adding to 20427436 its reverse (63472402), we get a palindrome (83899838).

The spelling of 20427436 in words is "twenty million, four hundred twenty-seven thousand, four hundred thirty-six".